Vulnerability-Lookup

RUSTSEC-2020-0159

Vulnerability from osv_rustsec – Published: 2020-11-10 12:00 – Updated: 2022-08-04 19:52 – Source website

Summary

Potential segfault in `localtime_r` invocations

Details

Impact

Unix-like operating systems may segfault due to dereferencing a dangling pointer in specific circumstances. This requires an environment variable to be set in a different thread than the affected functions. This may occur without the user's knowledge, notably in a third-party library.

Workarounds

No workarounds are known.

References

time-rs/time#293

References

URL

Type

	https://crates.io/crates/chrono	PACKAGE
	https://rustsec.org/advisories/RUSTSEC-2020-0159.html	ADVISORY
	https://github.com/chronotope/chrono/issues/499	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "categories": [
          "code-execution",
          "memory-corruption"
        ],
        "cvss": null,
        "informational": null
      },
      "ecosystem_specific": {
        "affected_functions": null,
        "affects": {
          "arch": [],
          "functions": [],
          "os": []
        }
      },
      "package": {
        "ecosystem": "crates.io",
        "name": "chrono",
        "purl": "pkg:cargo/chrono"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.0.0-0"
            },
            {
              "fixed": "0.4.20"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "versions": []
    }
  ],
  "aliases": [],
  "database_specific": {
    "license": "CC0-1.0"
  },
  "details": "### Impact\n\nUnix-like operating systems may segfault due to dereferencing a dangling pointer in specific circumstances. This requires an environment variable to be set in a different thread than the affected functions. This may occur without the user\u0027s knowledge, notably in a third-party library.\n\n### Workarounds\n\nNo workarounds are known.\n\n### References\n\n- [time-rs/time#293](https://github.com/time-rs/time/issues/293)",
  "id": "RUSTSEC-2020-0159",
  "modified": "2022-08-04T19:52:46Z",
  "published": "2020-11-10T12:00:00Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://crates.io/crates/chrono"
    },
    {
      "type": "ADVISORY",
      "url": "https://rustsec.org/advisories/RUSTSEC-2020-0159.html"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/chronotope/chrono/issues/499"
    }
  ],
  "related": [
    "CVE-2020-26235",
    "RUSTSEC-2020-0071"
  ],
  "severity": [],
  "summary": "Potential segfault in `localtime_r` invocations"
}

CVE-2020-26235 (GCVE-0-2020-26235)

Vulnerability from cvelistv5 – Published: 2020-11-24 21:20 – Updated: 2024-08-04 15:56

Title

Segmentation fault in Rust time crate

Summary

In Rust time crate from version 0.2.7 and before version 0.2.23, unix-like operating systems may segfault due to dereferencing a dangling pointer in specific circumstances. This requires the user to set any environment variable in a different thread than the affected functions. The affected functions are time::UtcOffset::local_offset_at, time::UtcOffset::try_local_offset_at, time::UtcOffset::current_local_offset, time::UtcOffset::try_current_local_offset, time::OffsetDateTime::now_local and time::OffsetDateTime::try_now_local. Non-Unix targets are unaffected. This includes Windows and wasm. The issue was introduced in version 0.2.7 and fixed in version 0.2.23.

Severity

5.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

CWE

CWE-476 - NULL Pointer Dereference

Assigner

GitHub_M mitre root Scorecard

References

3 references

URL	Tags
https://github.com/time-rs/time/security/advisori…	x_refsource_CONFIRM
https://github.com/time-rs/time/issues/293	x_refsource_MISC
https://crates.io/crates/time/0.2.23	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
time-rs	time	Affected: >= 0.2.7, <0.2.23

Show details on NVD website

JSON

To clipboard

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        "providerMetadata": {
          "dateUpdated": "2024-08-04T15:56:03.095Z",
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            "url": "https://crates.io/crates/time/0.2.23"
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          "vendor": "time-rs",
          "versions": [
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          "value": "In Rust time crate from version 0.2.7 and before version 0.2.23, unix-like operating systems may segfault due to dereferencing a dangling pointer in specific circumstances. This requires the user to set any environment variable in a different thread than the affected functions. The affected functions are time::UtcOffset::local_offset_at, time::UtcOffset::try_local_offset_at, time::UtcOffset::current_local_offset, time::UtcOffset::try_current_local_offset, time::OffsetDateTime::now_local and time::OffsetDateTime::try_now_local. Non-Unix targets are unaffected. This includes Windows and wasm. The issue was introduced in version 0.2.7 and fixed in version 0.2.23."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
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              "cweId": "CWE-476",
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      ],
      "providerMetadata": {
        "dateUpdated": "2020-11-24T21:20:14.000Z",
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      "references": [
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          "tags": [
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          ],
          "url": "https://github.com/time-rs/time/issues/293"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://crates.io/crates/time/0.2.23"
        }
      ],
      "source": {
        "advisory": "GHSA-wcg3-cvx6-7396",
        "discovery": "UNKNOWN"
      },
      "title": "Segmentation fault in Rust time crate",
      "x_legacyV4Record": {
        "CVE_data_meta": {
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          "ID": "CVE-2020-26235",
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        "affects": {
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            "vendor_data": [
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                        ]
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                "vendor_name": "time-rs"
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        "data_format": "MITRE",
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            }
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        },
        "impact": {
          "cvss": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
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            "baseScore": 5.3,
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            "integrityImpact": "NONE",
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            "version": "3.1"
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        "problemtype": {
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                  "lang": "eng",
                  "value": "CWE-476 NULL Pointer Dereference"
                }
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          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://github.com/time-rs/time/security/advisories/GHSA-wcg3-cvx6-7396",
              "refsource": "CONFIRM",
              "url": "https://github.com/time-rs/time/security/advisories/GHSA-wcg3-cvx6-7396"
            },
            {
              "name": "https://github.com/time-rs/time/issues/293",
              "refsource": "MISC",
              "url": "https://github.com/time-rs/time/issues/293"
            },
            {
              "name": "https://crates.io/crates/time/0.2.23",
              "refsource": "MISC",
              "url": "https://crates.io/crates/time/0.2.23"
            }
          ]
        },
        "source": {
          "advisory": "GHSA-wcg3-cvx6-7396",
          "discovery": "UNKNOWN"
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  "cveMetadata": {
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    "datePublished": "2020-11-24T21:20:14.000Z",
    "dateReserved": "2020-10-01T00:00:00.000Z",
    "dateUpdated": "2024-08-04T15:56:03.095Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

RUSTSEC-2020-0071 (CVE-2020-26235)

Vulnerability from osv_rustsec – Published: 2020-11-18 12:00 – Updated: 2024-06-05 14:00 – Source website

Summary

Potential segfault in the time crate

Details

Impact

The affected functions set environment variables without synchronization. On Unix-like operating systems, this can crash in multithreaded programs. Programs may segfault due to dereferencing a dangling pointer if an environment variable is read in a different thread than the affected functions. This may occur without the user's knowledge, notably in the Rust standard library or third-party libraries.

The affected functions from time 0.2.7 through 0.2.22 are:

time::UtcOffset::local_offset_at
time::UtcOffset::try_local_offset_at
time::UtcOffset::current_local_offset
time::UtcOffset::try_current_local_offset
time::OffsetDateTime::now_local
time::OffsetDateTime::try_now_local

The affected functions in time 0.1 (all versions) are:

time::at_utc
time::at
time::now
time::tzset

Non-Unix targets (including Windows and wasm) are unaffected.

Patches

Pending a proper fix, the internal method that determines the local offset has been modified to always return None on the affected operating systems. This has the effect of returning an Err on the try_* methods and UTC on the non-try_* methods.

Users and library authors with time in their dependency tree should perform cargo update, which will pull in the updated, unaffected code.

Users of time 0.1 do not have a patch and should upgrade to an unaffected version: time 0.2.23 or greater or the 0.3 series.

Workarounds

A possible workaround for crates affected through the transitive dependency in chrono, is to avoid using the default oldtime feature dependency of the chrono crate by disabling its default-features and manually specifying the required features instead.

Examples:

Cargo.toml:

chrono = { version = "0.4", default-features = false, features = ["serde"] }

chrono = { version = "0.4.22", default-features = false, features = ["clock"] }

Commandline:

cargo add chrono --no-default-features -F clock

Sources:
- chronotope/chrono#602 (comment)
- vityafx/serde-aux#21

Severity

6.2 (Medium)


                    
                      CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

URL

Type

	https://crates.io/crates/time	PACKAGE
	https://rustsec.org/advisories/RUSTSEC-2020-0071.html	ADVISORY
	https://github.com/time-rs/time/issues/293	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "categories": [
          "code-execution",
          "memory-corruption"
        ],
        "cvss": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
        "informational": null
      },
      "ecosystem_specific": {
        "affected_functions": null,
        "affects": {
          "arch": [],
          "functions": [
            "time::OffsetDateTime::now_local",
            "time::OffsetDateTime::try_now_local",
            "time::UtcOffset::current_local_offset",
            "time::UtcOffset::local_offset_at",
            "time::UtcOffset::try_current_local_offset",
            "time::UtcOffset::try_local_offset_at",
            "time::at",
            "time::at_utc",
            "time::now"
          ],
          "os": [
            "linux",
            "redox",
            "solaris",
            "android",
            "ios",
            "macos",
            "netbsd",
            "openbsd",
            "freebsd"
          ]
        }
      },
      "package": {
        "ecosystem": "crates.io",
        "name": "time",
        "purl": "pkg:cargo/time"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.0.0-0"
            },
            {
              "fixed": "0.2.0"
            },
            {
              "introduced": "0.2.1-0"
            },
            {
              "fixed": "0.2.1"
            },
            {
              "introduced": "0.2.2-0"
            },
            {
              "fixed": "0.2.2"
            },
            {
              "introduced": "0.2.3-0"
            },
            {
              "fixed": "0.2.3"
            },
            {
              "introduced": "0.2.4-0"
            },
            {
              "fixed": "0.2.4"
            },
            {
              "introduced": "0.2.5-0"
            },
            {
              "fixed": "0.2.5"
            },
            {
              "introduced": "0.2.6-0"
            },
            {
              "fixed": "0.2.6"
            },
            {
              "introduced": "0.2.7-0"
            },
            {
              "fixed": "0.2.23"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "versions": []
    }
  ],
  "aliases": [
    "CVE-2020-26235",
    "GHSA-wcg3-cvx6-7396"
  ],
  "database_specific": {
    "license": "CC0-1.0"
  },
  "details": "### Impact\n\nThe affected functions set environment variables without synchronization. On Unix-like operating systems, this can crash in multithreaded programs. Programs may segfault due to dereferencing a dangling pointer if an environment variable is read in a different thread than the affected functions. This may occur without the user\u0027s knowledge, notably in the Rust standard library or third-party libraries.\n\nThe affected functions from time 0.2.7 through 0.2.22 are:\n\n- `time::UtcOffset::local_offset_at`\n- `time::UtcOffset::try_local_offset_at`\n- `time::UtcOffset::current_local_offset`\n- `time::UtcOffset::try_current_local_offset`\n- `time::OffsetDateTime::now_local`\n- `time::OffsetDateTime::try_now_local`\n\nThe affected functions in time 0.1 (all versions) are:\n\n- `time::at_utc`\n- `time::at`\n- `time::now`\n- `time::tzset`\n\nNon-Unix targets (including Windows and wasm) are unaffected.\n\n### Patches\n\nPending a proper fix, the internal method that determines the local offset has been modified to always return `None` on the affected operating systems. This has the effect of returning an `Err` on the `try_*` methods and `UTC` on the non-`try_*` methods.\n\nUsers and library authors with time in their dependency tree should perform `cargo update`, which will pull in the updated, unaffected code.\n\nUsers of time 0.1 do not have a patch and should upgrade to an unaffected version: time 0.2.23 or greater or the 0.3 series.\n\n### Workarounds\n\nA possible workaround for crates affected through the transitive dependency in `chrono`, is to avoid using the default `oldtime` feature dependency of the `chrono` crate by disabling its `default-features` and manually specifying the required features instead.\n\n#### Examples:\n\n`Cargo.toml`:  \n\n```toml\nchrono = { version = \"0.4\", default-features = false, features = [\"serde\"] }\n```\n\n```toml\nchrono = { version = \"0.4.22\", default-features = false, features = [\"clock\"] }\n```\n\nCommandline:  \n\n```bash\ncargo add chrono --no-default-features -F clock\n```\n\nSources:  \n - [chronotope/chrono#602 (comment)](https://github.com/chronotope/chrono/issues/602#issuecomment-1242149249)  \n - [vityafx/serde-aux#21](https://github.com/vityafx/serde-aux/issues/21)",
  "id": "RUSTSEC-2020-0071",
  "modified": "2024-06-05T14:00:17Z",
  "published": "2020-11-18T12:00:00Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://crates.io/crates/time"
    },
    {
      "type": "ADVISORY",
      "url": "https://rustsec.org/advisories/RUSTSEC-2020-0071.html"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/time-rs/time/issues/293"
    }
  ],
  "related": [],
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Potential segfault in the time crate"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

RUSTSEC-2020-0159

Impact

Workarounds

References

CVE-2020-26235 (GCVE-0-2020-26235)

RUSTSEC-2020-0071 (CVE-2020-26235)

Impact

Patches

Workarounds

Examples:

Tags

Sightings

Nomenclature

Related by attack behaviour